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Biomedical subjects

Masashi Ozawa

Publications and source records attributed to Masashi Ozawa.

3 recordsLinked to original sources

Autopsy findings of patients with urological neoplasms.

BACKGROUND: A study was carried out to gain extensive understanding of the disease status in patients who had suffered and died of urological neoplasms. METHODS: The subjects were 524 patients who had died at the Department of Urology of Gunma Cancer Center. The autopsy rate for each urological, neoplasm, the extent of the disease, and incidental diseases were analyzed. RESULTS: Autopsies were performed in 27.1% (142/524) of the patients. Frequent metastatic sites were the lymph nodes, bone, and lung in prostate neoplasms; the lymph nodes, liver, and lung in bladder neoplasms; and the lymph nodes, lung, and bone in kidney neoplasms. In the 116 patients with these three major urological neoplasms, the autopsy findings of all patients were compatible with progression of the disease, except for 5 cases (acute myocardial infarction in 2 and liver failure in 3). Multiple primary cancers were seen in 21.6% (25/116), and other cancers that caused death, apart from those at urological sites, were confirmed in 7 patients (pancreas in 2, and esophagus, lung, gallbladder, liver, and uterus in 1 patient each). CONCLUSION: Autopsies revealed the macroscopic and microscopic extent of the disease and the presence of incidental disease beyond the diagnosis made in the patient's lifetime.

Adolescent↗

Tumor-associated tissue eosinophilia of penile cancer.

BACKGROUND: Tumor-associated tissue eosinophilia (TATE) occurs in many kinds of cancer. This study analyzed whether TATE improves the survival of penile cancer patients. METHODS: In 17 patients with penile cancer, survival was compared between the TATE-positive group and the TATE-negative group. Tissue eosinophils were observed by transmission electron microscopy. RESULTS: In all cases, 5-year survival was 72.9% in the TATE-positive group (n = 8) and 38.9% in the TATE-negative group (n = 9; P = 0.131). In stage III and IV, it was 60% in the TATE-positive group (n = 5) and 0% in the TATE-negative group (n = 5; P = 0.058). Transmission electron microscopy images revealed the vigorous infiltration of tissue eosinophils. CONCLUSIONS: It is suggested that TATE improves the survival of patients with advanced penile cancer. However, a greater number of subjects is needed to prove statistical significance.

Eosinophilia↗

Database and analysis system for cDNA clones obtained from full-length enriched cDNA libraries.

We have developed an efficient sequence-analysis system and a database system for clones obtained from full-length enriched cDNA libraries made by using the oligo-capping method. We developed a semi-automatic analysis system for 5'- and 3'-end sequences. It pre-processes raw sequences (vector cut and accurate-sequence region extraction), clusters the sequences, searches for similarities through public databases, annotates completeness of clones and analyzes the ORFs in the sequences. Newly developed or improved programs are used in each step. A new program, ESTiMateFull is used to evaluate and to predict the sequence-fullness based on comparisons with mRNA and EST sequences, respectively. The ATGpr program is used to predict sequence-fullness based on statistical information. The combination of full-length enriched cDNA clones and ATGpr fullness prediction resulted in 70% accuracy in the specificity and the sensitivity of the fullness predictions. For the ORFs predicted by the ATGpr, the signal peptides are predicted and a motif search is performed by our new system. We also developed a program that assembles our sequences with dbEST sequences and developed a system to retrieve clones by the characteristics of the ORFs. As keywords, combination of various results of the analyses can be used for retrieval. And various results such as ORF features and database search results can be shown on the same screen by multiple displays. Full-length clones having interesting functions can thus be retrieved efficiently by using this system.

Amino Acid Sequence↗